Know your gear
The Code Operated Matrix Switch (COMS) is just what you need. It performs any-to-any switching between its five ports in response to ASCII-character-based commands. If you have more than five devices, you can add the 4-Port Expansion Board for a total of nine ports. Or you can even cascade COMSes.
It doesn't matter if your devices aren't absolutely compatible. Each port on the COMS can be independently configured for data rate, data format, flow control and break detection. You can also independently set each port as DTE or DCE, so you can use straight-through-pinned cables to connect most devices.
It doesn't matter if your devices aren't absolutely compatible. Each port on the COMS can be independently configured for data rate, data format, flow control and break detection. You can also independently set each port as DTE or DCE, so you can use straight-through-pinned cables to connect most devices.